Unit 3A - EMS System Review

Day and night are caused by

• the tilt of Earth’s axis.

• Earth’s revolution around the sun.

• eclipses.

• Earth’s rotation on its axis.

Earth has seasons because

• it rotates on its axis.

• the distance between Earth and the sun changes.

• its axis is tilted as it moves around the sun.

• the temperature of the sun changes.

When the north end of Earth’s axis is tilted toward the sun, North America will experience

• more indirect rays and shorter days.

• more indirect rays and longer days.

• more direct rays and shorter days.

• more direct rays and longer days.

The phase of the moon you see depends on

• where you are on Earth’s surface.

• how much of the sunlit side of the moon faces Earth.

• how much of the moon’s surface is lit by the sun.

• whether or not an eclipse is occurring.

Which two (2) phases are gibbous moons?

• C

• D

• E

• F

• G

Which phase occurs at the beginning of the lunar cycle?

• A

• B

• D

• F

• H

Tides are caused mainly by

• Earth’s rotation on its axis, which causes water to move.

• differences in how much the sun pulls on different parts of Earth.

• strong winds blowing water onto coasts.

• differences in how much the moon pulls on different parts of Earth.

Where in the diagram would the Moon be located during a Spring Tide? SELECT ALL THAT APPLY

• A

• C

• E

• G

During what phase of the moon can a lunar eclipse occur?

• new moon

• first quarter

• waxing gibbous

• full moon

For a solar eclipse to occur,

• the sun must be directly between Earth and the moon.

• the moon must be directly between Earth and the sun.

• the moon must be directly behind Earth.

• Earth must be directly between the sun and the moon.